High Density Filler-43 oz.

WEST SYSTEM 404 High-Density Adhesive Filler is an epoxy thickening additive for building maximum-strength, high-cyclic hardware bonds. It also works as a high-strength filleting and gap-filling compound, curing to an off-white color.

Key Features

• Epoxy thickening additive designed for maximum physical properties in hardware bonding where high cyclic loads are anticipated.
• Use for filleting and gap filling when maximum strength is necessary.
• Cures to an off-white color.

Intended Use

• Marine hardware bonding repairs
• Structural epoxy bonding and patching
• Epoxy fillets in boat repair and fabrication
• Gap filling with thickened epoxy mixes

Product Details

• Product name: High Density Filler-43 oz.
• SKU (Shopify variant): 655-40445
• Packaging size: 43 oz
• Color after cure: Off-White

Parts Desk Insights

Best Use Case: Best for making thickened epoxy high-density mixes that stay non-slumping and add strength to hardware bonds, fillets, and gap-filling areas.

Common Issues: Common results vary if you dont mix thoroughly into the epoxy resin/hardener and apply the correct consistency; for best outcomes, follow the epoxy systems mixing and application guidance and confirm youre using the high-density (adhesive) filler rather than a low-density fairing filler.

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